mac sierra install error

[niccolox]

this is my first Terraform experience, so this might be a Terraform bug, but I get this error on Mac

( note, I can download the binary and add it to the terraform.d/plugins/darwin_amd64 folder and it works)

➜ ~ go get -u github.com/squat/terraform-provider-vultr
➜ ~ mkdir -p ~/.terraform.d/plugins
ln -s "$GOPATH/bin/terraform-provider-vultr" ~/.terraform.d/plugins/terraform-provider-vultr

➜ folkbot-debops git:(master) ✗ cd terraform/vultr/coreos
➜ coreos git:(master) ✗ terraform init

Initializing the backend...

Initializing provider plugins...

• Checking for available provider plugins...

Provider "vultr" not available for installation.

A provider named "vultr" could not be found in the Terraform Registry.

This may result from mistyping the provider name, or the given provider may
be a third-party provider that cannot be installed automatically.

In the latter case, the plugin must be installed manually by locating and
downloading a suitable distribution package and placing the plugin's executable
file in the following directory:
terraform.d/plugins/darwin_amd64

Terraform detects necessary plugins by inspecting the configuration and state.
To view the provider versions requested by each module, run
"terraform providers".